Area: 356 959 km² - Population: 82, 4 million - Capital: Berlin
Official Language: German - Date of joining the EU: a founding member in 1957

Area: 83 859 km² - Population: 8,3 million - Capital: Vienna
Official language: German - Date of joining the EU: 1995

Area: 30 528 km² - Population: 10.51 millions - Capital: Brussels
Official Languages: Dutch, French, German - Date of joining the EU: a founding member in 1957

Area: 110 911 km² - Population: 7.4 million - Capital: Sofia
Official language: Bulgarian – Date of joining the EU: 2007

Area: 9 251 km² - Population: 1 million (including the “occupied” part in the north of the island) - Capital: Nicosia
Official languages: Greek, Turkish - Date of joining the EU: 2004

Area: 43 098 km² - There are two associated autonomous territories, the Feroe Islands (1 400 km² and 48 000 inhabitants) and Greenland (2,175 millions m² and 56 000 inhabitants) - Population: 5.4 millions - Capital: Copenhagen
Official language: Danish - Date of joining the EU: 1973

Area: 504 782 km² - Population: 44 million - Capital: Madrid - Official language: Spanish (the other Spanish languages are also official in their respective autonomous communities) - Date of joining EU: 1986

Area: 45 227 km² - Population: 1.34 million - Capital: Tallinn
Official language: Estonian - Date of joining EU: 2004

Area: 338 145 km² - Population: 5.2 million - Capital: Helsinki
Official languages: Finnish and Swedish - Date of joining EU: 1995

Area: 131 957 km² - Population: 10.66 million - Capital: Athens
Official language: Modern Greek - Date of joining the EU: 1981

Area: 93 032 km² - Population: 10 million - Capital: Budapest
Official language: Hungarian - Date of joining the EU: 2004

Area: 70 273 km² - Population: 5.7 million- Capital: Dublin
Official languages: English and Irish (Gaelic) - Date of joining the EU: 1973

Area: 301 308 km² - Population: 58.9 million - Capital: Rome
Official language: Italian - Date of joining EU: a founding member in 1957

Area: 64 600 km² - Population: 2.27 million- Capital: Riga
Official language: Latvian - Date of joining the EU: 2004

Area: 65 300 km² - Population: 3.4 million - Capital: Vilnius
Official language: Lithuanian - Date of joining the EU: 2004

Area:  315 km² - Population:  0.4 million - Capital:  La Valette
Official languages:  Maltese and English - Date of joining the EU:  2004

Area:  41 864 km² - Population:  16.4 million - Capital:  Amsterdam – Seat of government: The Hague
Official Language:  Dutch - Date of joining the EU:  founding member in 1957

Area:  312 683 km² - Population: 38.19 million - Capital: Warsaw
Official Language: Polish - Date of joining the EU: 2004

Area: 92 072 km² - Population: 10.8 million - Capital: Lisbon
Official Language: Portuguese - Date of joining the EU: 1986

Area: 70 870 km² - Population: 10.3 million - Capital: Prague
Official Language: Czech - Date of joining the EU: 2004

Area : 237 500 km² - Population:  21.7 million - Capital:  Bucharest
Official Language:  Romanian - Date of joining the EU:  2007

Area:  244 101 km² - Population:  60.2 million - Capital:  London
Official Language:  English - Date of joining the EU:  1973

Area: 49 035 km² - Population: 5 million - Capital: Bratislava
Official Language: Slovak - Date of joining the EU:  2004

Area:  20 273 km² - Population:  2 million - Capital:  Ljubljana
Official Language:  Slovene - Date of joining the EU:  2004

Area: 450 000 km² - Population: 9.1 million - Capital: Stockholm
Official Language: Swedish - Date of joining the EU: 1995